    <input type="hidden" name="region[start_x]" id="region_start_x" value="0" />
    <input type="hidden" name="region[start_y]" id="region_start_y" value="0" />
    <input type="hidden" name="region[end_x]" id="region_end_x" value="0" />
    <input type="hidden" name="region[end_y]" id="region_end_y" value="0" />